# Into Math Grade 2 Module 1 Lesson 2 Answer Key Develop Fluency with Addition Using Mental Strategies and Properties

We included HMH Into Math Grade 2 Answer Key PDF Module 1 Lesson 2 Develop Fluency with Addition Using Mental Strategies and Properties to make students experts in learning maths.

## HMH Into Math Grade 2 Module 1 Lesson 2 Answer Key Develop Fluency with Addition Using Mental Strategies and Properties

I Can add in any order, add zero, and use strategies to find sums.

Choose two numbers. How can you show the sum of the numbers?  Explanation:
The numbers i chose are 9 and 5
The addition facts are 9 + 5 = 14, 5 + 9 = 14.

Have children work in pairs. Read the following: Choose two numbers. How can you show the sum of the numbers you choose? Hove children write two addition facts to represent the sum.

Build Understanding
Francie draws 7 pictures on Monday. She draws 5 pictures on Tuesday. How many pictures does she draw?

A. How can you use tools to show the problem?  Explanation:
7 + 5 = 12
Francie have 12 pictures.

B. What addition fact can you use to solve this problem?
___ + ____ = _____ 7 + 5 = 12

C. How can you change the order of the addends to write a related addition fact? 7 + 5 = 12
5 + 7 = 12
12 – 5 = 7
12 – 5 = 7

D. How many pictures does Francie draw?
____ pictures
7 + 5= 12
Francie drew 12 pictures.

Mr. Weston picks 6 red tulips and 8 white tulips from his garden. How many tulips does he pick?

A. How can you write related addition facts to solve the problem?
___ + ___ = ____
___ + ___ = ____
6 + 8 = 14
8 + 6 = 14

B. Solve. Mr. Weston picks ___ tulips.
6 + 6 = 12, 12 + 2= 14
6 + 8 = 14

Explanation:
Mr. Weston picked 14 tulips

José has 8 red blocks. He has 0 green blocks. How many blocks does he have?

A. How can you show this problem?  B. What addition fact can you use to solve this problem?
___ + ___ = _____
8 + 0 = 8
0 + 8 = 8

C. Solve. Jase has ___ blocks.
8 + 0 = 8

Explanation:
Jase has 8 blocks.

Turn and Talk What do you know about the sum when you add 0 to a number?

Step It Out

1. There are 9 frogs in a pond. There are 3 frogs on the shore. How many frogs are there? A. Make a concrete model of the problem. Draw to show what you did.  B. Count on to add. Start at q, Count on 3.
9, ___, ___, ____
9, 12, 15, 18

C. Write an addition fact to show the problem. Solve.
___ + ___ = ____ ____ frogs
9 + 3 = 12

Explanation:
9 + 3 =
Make ten:
9 + 1 = 10, 10 + 2 = 12
There are 12 frogs.

Check Understanding Math Board

Question 1.
There are 8 toy rockets and 7 dolls in a toy box. How many toys are in the toy box? ____ toys
15 toys

Explanation:
8 + 7 = 15
Make ten:
8 + 2 = 10, 10 + 5 = 15
There are 15 toys in the toy box.

Find the sum.

Question 2.
___ = 9 + 2
11

Explanation:
9 + 2 = 11
Make ten:
9 + 1 = 10, 10 + 1= 11
The sum of 9 and 2 is 11.

Question 3.
o + 5 = ___
5

Explanation:
0 + 5 = 5
the sum of 0 and 5 is 5.

Question 4.
Attend to Precision There are 8 roses on one rose bush. On another rose bush, there are 2 roses. How
many roses are there? Explain the strategy you used.
10

Explanation:
8 + 2 = 10
There are 10 roses.

Question 5.
Reason There are 4 white goats in a field. There are 7 brown goats. How many goats are in the field?
___ goats 11

Explanation:
4 + 7 = 11
Make ten:
4 + 6 = 10, 10 + 1= 11
There are 11 goats in the field.

Use Structure Find the sum.

Question 6.
6 + 2 = ____
8

Explanation:
6 + 2 = 8
The sum of 6 and 2 is 8.

Question 7.
0 + 6 = ____
6

Explanation:
0 + 6 = 6
The sum of 0 and 6 is 6.

Question 8.
___ = 3 + 8
11

Explanation:
3 + 8 = 11
Make ten:
3 + 7 = 10, 10 + 1= 11
The sum of 3 and 8 is 11.

Question 9.
___ = 8 + 8
16

Explanation:
8 + 8 = 16
Make ten:
8 + 2 = 10, 10 + 6 = 16.
The sum of 8 and 8 is 16.

Question 10.
Open Ended What addition strategy would you choose to solve 3 + 9? Explain why.

Explanation:
3 + 9 =
Make ten:
3 + 7 = 10, 10 + 2 = 12
So, 3 + 9 = 12.

Use Structure Solve. Show your work.

Question 11.
There are 9 children at one table. There are 0 children at another table. How many children are there?
___ children
9

Explanation:
9 + 0 = 9
There are 9 children.

Question 12.
Malik has 6 horse puzzles and 5 cat puzzles. How many puzzles does she have?
____ puzzles 11 puzzles

Explanation:
6 + 5 =
Make ten:
6 +4 = 10, 10 + 1= 11
There are 11 puzzles with Malik.

Use Repeated Reasoning Find the sum.

Question 13.
4 + 3 = ___
7

Explanation:
4 + 3 = 7
The sum of 4 and 3 is 7.

Question 14.
___ = 7 + 2
9

Explanation:
7 + 2 = 9
The sum of 7 and 2 is 9.

Question 15.
___ = 8 + 4
12

Explanation:
8 + 4 = 12
Make ten: 8 + 2 = 10, 10 + 2 = 12.
The sum of 8 and 4 is 12.

Question 16.
7 + 0 = ____